Free tools
Tools
100 free tools for everyday tasks: a word counter and case converter, a password generator and strength checker, unit and cubic yard converters, feet and inches and board foot calculators for DIY projects, a percentage calculator, date, age and time calculators, and an online timer, stopwatch and countdown. They run entirely in your browser: nothing you type is uploaded, and there is no sign-up. Planning a home project? See the Home & DIY calculators.
No tool matches “”. Try the Home & DIY calculators instead
Text, data & files
Count, compare and clean text, format and encode JSON, CSV, Base64, URLs and HTML, test regex, check colour contrast, and make QR codes or resized images.
Word Counter
Count words, characters, sentences and reading time, and check your text against X, LinkedIn, Instagram, SMS and meta description limits.
Open toolCase Converter
Convert text to UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case or CONSTANT_CASE. Stays in your browser.
Open toolRemove Duplicate Lines
Remove duplicate lines from a list, keep the first or last copy, and sort A to Z, naturally or at random. Works in any language and stays in your browser.
Open toolText Compare
Compare two texts and see what changed, line by line with changed words highlighted. Ignore case or spacing, copy a unified diff. Stays in your browser.
Open toolLorem Ipsum Generator
Generate lorem ipsum by paragraphs, sentences, words or an exact character count, as plain text, HTML or Markdown. Built from the classic Latin passage.
Open toolJSON Formatter & Validator
Validate JSON with the exact line and column of any error, then pretty-print, minify or sort keys. Big numbers keep every digit. Runs in your browser.
Open toolBase64 Encode & Decode
Encode text or a file to Base64 and decode it back, with correct UTF-8 for emoji and any language, URL-safe and MIME variants. Runs in your browser.
Open toolURL Encode & Decode
Percent-encode or decode URLs and query strings with correct UTF-8, split a URL into parts and parameters, and catch double-encoding. Runs in your browser.
Open toolColor Contrast Checker
Check the WCAG 2.2 contrast ratio of text on a background, see AA and AAA pass or fail, preview it live, and get the nearest text color that passes.
Open toolCSV to JSON Converter
Convert CSV to JSON or JSON to CSV in your browser. Handles quoted fields, line breaks, any delimiter, and shows the exact line and column of an error.
Open toolHTML Entity Encoder & Decoder
Escape text for safe HTML or decode named, decimal and hex character references the way browsers do, with all 2,231 standard names. Runs in your browser.
Open toolRegex Tester
Test JavaScript regular expressions: highlighted matches, capture groups, replacements with $1 or $<name>. Stops runaway patterns. Runs in your browser.
Open toolImage Resizer
Resize and compress JPEG, PNG and WebP images by width, height, percent or longest side, and convert the format. Runs in your browser; nothing is uploaded.
Open toolQR Code Generator
Turn a link, text, Wi-Fi login, email or phone into a QR code. Set error correction, size and colors, then download PNG or SVG. Made on your device.
Open toolText to Binary Converter
Convert text to binary, hex, octal or decimal bytes and back. UTF-8 by default (é is 2 bytes, an emoji 4) or UTF-16, with a per-character breakdown.
Open toolMarkdown Table Generator
Build a GitHub Markdown table from an editable grid or pasted CSV, TSV or spreadsheet cells. Set column alignment, pad columns, and parse a table back.
Open toolURL Slug Generator
Turn titles into clean URL slugs: hyphen or underscore, accents to ASCII, optional stop-word removal and a max length. Batch mode warns about duplicates.
Open toolSMS Character Counter
Count SMS segments: GSM-7 (160 / 153) or UCS-2 (70 / 67), characters left, and which characters force UCS-2, with a one-click GSM-friendly fix.
Open toolJSON to YAML Converter
Convert JSON to YAML or YAML to JSON in your browser. Quotes strings YAML would misread, writes | blocks, and shows the line and column of any error.
Open toolMorse Code Translator
Translate text to Morse code and back, with audio at any WPM (Farnsworth too) and a full ITU-R M.1677-1 chart with punctuation, @ and SOS.
Open toolTyping Speed Test
Free typing speed test for 30 seconds, 60 seconds or 2 minutes: live WPM, net WPM, accuracy and characters per minute, with the scoring formulas shown.
Open toolBarcode Generator
Make Code 128, EAN-13, UPC-A, EAN-8 and Code 39 barcodes with check digits and quiet zones. Download PNG or SVG at your size and DPI. Made on your device.
Open toolImage Color Picker
Pick any pixel of an image for its HEX, RGB, HSL and OKLCH value, and get its dominant colors with contrast. Runs in your browser; nothing is uploaded.
Open tool
Passwords & security
Generate and check passwords, hashes and UUIDs, and decode JWTs, all on your device and never sent anywhere.
Password Generator
Make a strong random password or passphrase on your device: choose length and characters, see its strength in bits and copy it. Nothing is sent.
Open toolPassword Strength Checker
Check how strong your password is: a 0–4 score, crack times, and the patterns that weaken it, with tips to fix them. Checked on your device, never sent.
Open toolHash Generator
Hash text or a file with SHA-256, SHA-1, SHA-384, SHA-512, MD5 and CRC32, add an HMAC key, and check a checksum. Runs in your browser; nothing is uploaded.
Open toolUUID Generator
Generate random v4 and time-ordered v7 UUIDs on your device, up to 1,000 at a time, and inspect any UUID for its version, variant and embedded timestamp.
Open toolJWT Decoder
Decode a JWT to its header and payload, read exp, iat and nbf as UTC times, spot expired or alg none tokens, and check HMAC signatures. Runs locally.
Open tool
Converters
Units, cooking measures, cubic yards to bags and tons, number bases, Roman numerals and colour formats.
Unit Converter
Convert length, area, volume, weight and temperature with exact factors, plus cubic yards, tons and bags for gravel, soil, sand and concrete.
Open toolNumber Base Converter
Convert whole numbers between binary, octal, decimal, hex and any base from 2 to 36, up to 5,000 digits, with grouped digits and a two’s-complement view.
Open toolCubic Yards to Tons
Convert cubic yards to tons and back for gravel, sand, topsoil, river rock and concrete, with weight-per-yard tables for each material.
Open toolCubic Yards to Bags
How many bags make a cubic yard: 0.5 to 3 cu ft bags of mulch, soil, gravel or sand, and 40, 60 or 80 lb concrete mix bags, both ways.
Open toolRoman Numeral Converter
Convert numbers and years to Roman numerals and back, 1 to 3,999 (larger with a bar). Strict checking explains why IIII, VX or IC are not valid.
Open toolColor Converter & Contrast Checker
Convert any CSS color between HEX, RGB, HSL, HWB, CMYK and OKLCH, find the nearest named color, and check WCAG 2 contrast for AA and AAA text.
Open toolCooking Measurement Converter
Convert cups, tablespoons, teaspoons and ml with US, metric, Australian or UK sizes, get kitchen fractions like 3 tbsp + 1 tsp, and scale a recipe.
Open toolChmod Calculator
Convert Unix file permissions between a checkbox grid, octal (755, 4755), ls -l text (rwxr-xr-x) and chmod commands; apply changes like u+x,go-w.
Open toolCSS Gradient Generator
Build linear, radial and conic CSS gradients with up to 8 color stops, preview them live, copy the CSS or a Tailwind class, and check text contrast.
Open toolPX to REM Converter
Convert px to rem, em, pt, % and vw/vh with an editable root font size, see a px to rem table, or paste CSS and convert every px value to rem at once.
Open toolTire Size Calculator
Decode a tire size like 225/45R17 into width, sidewall, diameter and revs per mile, compare two sizes for speedometer error, and read load and speed codes.
Open toolColor Palette Generator
Make a color palette from one base color: complementary, analogous, triadic, square and monochromatic harmonies, plus a 50-900 scale made in OKLCH.
Open toolHeat Index and Wind Chill Calculator
Heat index from temperature and humidity, wind chill from temperature and wind speed, and dew point, using the NWS formulas in °F or °C, mph or km/h.
Open tool
Measure & build
Tape-measure math in feet, inches and fractions, board feet, stairs and slope, plus generator and wire sizing.
Feet and Inches Calculator
Add, subtract, multiply and divide lengths like 5' 7 3/8" with exact fractions, rounded to 1/16 inch, plus decimal feet, mm and cm and a tape view.
Open toolBoard Foot Calculator
Board feet for a whole cut list: pieces × thickness × width × length, 4/4 to 16/4 hardwood or nominal 2×4s, with waste and the cost at your price.
Open toolSlope Calculator
Find slope from rise and run, or rise or run from a slope: percent, degrees, ratio like 1:12, roof pitch and line length, in feet and inches or metric.
Open toolStair Calculator
Find risers, treads, exact riser height, run, stair angle and stringer length from the total rise, with an IRC model-code check. Inches or metric.
Open toolVoltage Drop Calculator
Estimate voltage drop in volts and percent for copper or aluminum wire, single or three phase, and find the smallest AWG size that stays within 3% or 5%.
Open toolGenerator Size Calculator
Add up running watts and the largest starting surge for the appliances you want to power, and get a generator size with amps at 120 and 240 volts.
Open toolConduit Fill Calculator
Check how many wires fit in EMT, rigid, PVC or flexible conduit under NEC Chapter 9: fill percent, pass or fail, and the most of one wire size that fits.
Open toolTV Size and Viewing Distance Calculator
Find the TV size for your seating distance, or the best viewing distance for a TV size, using SMPTE and THX viewing angles, pixel limits and mount height.
Open toolWire Size Calculator
Find the smallest copper or aluminum wire size for a load: checks NEC ampacity, the 240.4(D) small-wire limits and voltage drop, and shows which governs.
Open tool
Math & money
Percentages, averages, fractions and ratios, tips, sales tax, loans, interest, fuel cost and grades, plus random numbers and name picks, with the formula shown.
Percentage Calculator
Work out X% of Y, what percent X is of Y, percentage change, a % increase or decrease, and the original before a discount, with the formula shown.
Open toolFraction Calculator
Add, subtract, multiply and divide fractions and mixed numbers like 2 3/8 + 1 5/16, simplify, and convert to decimals, with every step shown.
Open toolRandom Number Generator
Pick a random number between any two numbers, draw several with or without repeats, flip a coin or roll dice. Fair, unbiased and drawn on your device.
Open toolRandom Name Picker
Paste a list and pick a random winner, shuffle it or split it into teams. Every entry has the same chance, and your list never leaves your device.
Open toolAspect Ratio Calculator
Find the aspect ratio of any width and height (1920×1080 is 16:9), resize to a ratio to solve the missing side, or get a screen’s size from its diagonal.
Open toolDecimal to Fraction Converter
Turn a decimal like 0.375 or 0.1(6) into an exact fraction, or round inches to the nearest 1/16 or 1/32 on a tape measure, with the working shown.
Open toolAverage Calculator
Paste a list of numbers and get the mean, median, mode, range, sum, count and standard deviation, plus a weighted average, with the working shown.
Open toolScientific Notation Converter
Convert any number to scientific, E and engineering notation or back to standard form, round to significant figures, and count the sig figs you typed.
Open toolTip Calculator
Work out the tip, the total and each person’s share of a bill, before or after tax, with optional rounding. Exact to the cent, all in your browser.
Open toolGPA Calculator
Work out your GPA from credits and letter grades or percentages: unweighted, weighted (Honors, AP/IB), cumulative, and the GPA you need next.
Open toolGas Mileage & Fuel Cost Calculator
Work out a trip’s fuel and cost, your mileage from a fill-up, or convert MPG (US and UK), L/100 km and km/L. Split the cost between people.
Open toolSales Tax Calculator
Add sales tax, VAT or GST to a price, take it out of a tax-inclusive price, or find the rate from two prices. Exact to the cent, all in your browser.
Open toolRatio & Proportion Calculator
Solve a/b = c/d for x by cross-multiplication with the steps shown, simplify a ratio like 6:9:15, or split a total in a ratio such as 120 in 2:3:5.
Open toolLoan Calculator
Monthly payment, total interest and a full amortization schedule for a fixed-rate loan, with optional extra payments. Exact to the cent, in your browser.
Open toolFinal Grade Calculator
Find the score you need on the final exam to reach the grade you want, from your current grade and the final’s weight, or from weighted categories.
Open toolCompound Interest Calculator
Future value with compound interest: initial deposit, rate, compounding frequency, optional monthly or yearly contributions, APY and a year-by-year table.
Open toolNumber to Words Converter
Convert numbers to English words, check amounts and ordinals, or words back to digits. Exact up to 66 digits, with optional British “and”.
Open toolRandom Team Generator
Paste names, choose how many teams or people per team, and split them randomly and evenly. Reshuffle, copy the teams or share a link to the same split.
Open toolIP Subnet Calculator
Work out the network, broadcast, usable hosts, masks and binary of any IPv4 CIDR block, split it into subnets, and expand or compress IPv6 addresses.
Open toolUnit Price Calculator
Compare products by price per ounce, pound, liter or count. Mixed units are converted exactly, ranked cheapest first, and weight versus volume is flagged.
Open toolElectricity Cost Calculator
Find what an appliance or a list of appliances costs to run: kWh and cost per day, month and year from watts (or amps and volts), hours and your rate.
Open toolHourly to Salary Calculator
Convert hourly pay to salary and back across daily, weekly, biweekly, semimonthly, monthly and annual, with unpaid weeks off and overtime. Pre-tax.
Open toolMortgage Calculator
Monthly mortgage payment with taxes, insurance, HOA and PMI (and the month PMI ends), plus total interest and an amortization schedule. In your browser.
Open toolCredit Card Payoff Calculator
Months to pay off a credit card at a fixed payment, or the payment to be debt-free in N months, with total interest and a schedule. Exact to the cent.
Open toolDiscount Calculator
Sale price from a percent or dollar discount, stacked discounts as one effective percent, buy-one-get-one deals, tax after discount, and original price.
Open toolBreak-Even Calculator
Break-even units and revenue from fixed costs, price and variable cost, plus contribution margin, margin of safety and units for a target profit.
Open toolROI Calculator
Return on investment from amount invested and returned: ROI %, dollar gain and annualized ROI (CAGR) from years or dates, with optional fees and income.
Open toolSavings Goal Calculator
How much to save each month, biweekly or weekly to reach a savings goal by a date, or how long a fixed deposit takes. APY-based, exact to the cent.
Open toolStandard Deviation Calculator
Paste numbers and get the standard deviation (sample and population), variance, mean, quartiles and z-scores, with the step-by-step working and a dot plot.
Open toolGCF and LCM Calculator
Find the GCF (GCD) and LCM of 2 to 20 numbers with Euclid’s algorithm, prime factors and multiples shown, plus Bézout coefficients and fraction reduction.
Open toolPrime Factorization Calculator
Check if a number is prime and get its prime factors, factor tree, divisors, divisor count and sum, Euler’s totient, and the next and previous prime.
Open toolQuadratic Equation Solver
Solve ax² + bx + c = 0 step by step: discriminant, exact and decimal roots (real or complex), vertex, factored form, completing the square and a graph.
Open tool
Dates & time
Days between dates, your exact age, adding hours and days, time zones, Unix timestamps and cron schedules, pace and timesheets, timers and countdowns.
Days Between Dates
Count the days between two dates, with weeks, months and years, business days and US federal holidays. Include or leave out the end date.
Open toolAdd Days to a Date
Add or subtract days, weeks, months, years or business days from a date and see the date you land on, with month ends and leap years handled.
Open toolAge Calculator
Your exact age in years, months and days on any date, in total weeks, days and hours, with a countdown to your next birthday. Feb 29 births handled.
Open toolTime Calculator
Add hours and minutes to a date and time ("72 hours from now"), find the hours between two times, and add up a timesheet, with daylight saving handled.
Open toolTime Zone Converter
Convert a time between time zones and plan a meeting: see several cities side by side, where working hours overlap, and daylight saving changes.
Open toolOnline Timer
Free online timer with alarm: run several named timers at once, quick presets, Pomodoro mode, +1 min, full screen and notifications.
Open toolStopwatch
Online stopwatch with laps: lap and split times to the hundredth, fastest and slowest lap, copy laps as text, keyboard shortcuts, full screen.
Open toolCountdown to a Date
Count down to any date and time in days, hours, minutes and seconds, and share a link that shows the same countdown in each viewer’s time zone.
Open toolUnix Timestamp Converter
Convert a Unix timestamp to a date and a date to a timestamp. Seconds to nanoseconds, any time zone, plus a live counter of the current Unix time.
Open toolWeek Number Calculator
Find the week number of any date in the ISO 8601 and US systems, or the dates a week number covers. Also day of the year, days left and quarter.
Open toolDay of the Week Calculator
Find out what day of the week any date falls on, from year 1 to 9999. Shows the ISO week, the nth weekday of the month, and a Doomsday-rule mental method.
Open toolMilitary Time Converter
Convert military time (24-hour) to standard 12-hour time and back: 1430, 2:30 pm, noon, 2400. How to say it, a 24-hour chart and the Zulu zone letters.
Open toolPace Calculator
Work out pace, finish time or distance from the other two for running, walking or cycling, with km and mile splits and finish times for common races.
Open toolCron Expression Explainer
Paste a 5-field cron expression and read it in plain English, with the next 10 run times in your time zone or UTC. Handles names, steps and @daily.
Open toolTimesheet Calculator
Add up weekly hours from start and end times and unpaid breaks, overnight shifts included. Shows h:mm and decimal hours, with optional pay and overtime.
Open toolBusiness Days Calculator
Count working days between two dates, or add and subtract business days from a date. Skips weekends and US federal holidays on their observed dates.
Open toolSpeed, Distance and Time Calculator
Enter any two of speed, distance and time and get the third, in mph, km/h, knots and more. Add stops and a departure time to see when you arrive.
Open toolPomodoro Timer
Free Pomodoro timer: 25-minute focus sessions, 5-minute breaks and a long break every 4 sessions. Editable lengths, auto-start, session counter, alarm.
Open tool